diff --git a/iOS Example/Cartfile b/iOS Example/Cartfile
index 4056d09..6c7e3a8 100644
--- a/iOS Example/Cartfile	
+++ b/iOS Example/Cartfile	
@@ -1 +1 @@
-github "ReactiveX/RxSwift" ~> 4.3
+github "ReactiveX/RxSwift" ~> 4.3.1
diff --git a/iOS Example/Cartfile.resolved b/iOS Example/Cartfile.resolved
index b8f6784..b34f3f7 100644
--- a/iOS Example/Cartfile.resolved	
+++ b/iOS Example/Cartfile.resolved	
@@ -1 +1 @@
-github "ReactiveX/RxSwift" "4.3.0"
+github "ReactiveX/RxSwift" "4.3.1"
diff --git a/iOS Example/iOS Example.xcodeproj/project.pbxproj b/iOS Example/iOS Example.xcodeproj/project.pbxproj
index 63a9f65..b74e171 100644
--- a/iOS Example/iOS Example.xcodeproj/project.pbxproj	
+++ b/iOS Example/iOS Example.xcodeproj/project.pbxproj	
@@ -66,6 +66,7 @@
 				B388AB0C1C6567FA00726BCA /* RxMediaPicker.framework */,
 				B388AAF71C65648700726BCA /* iOS Example */,
 				B388AAF61C65648700726BCA /* Products */,
+				FC379B442167D6DA00D47524 /* Recovered References */,
 			);
 			sourceTree = "<group>";
 		};
@@ -89,6 +90,14 @@
 			path = "iOS Example";
 			sourceTree = "<group>";
 		};
+		FC379B442167D6DA00D47524 /* Recovered References */ = {
+			isa = PBXGroup;
+			children = (
+				B388AAE91C65640700726BCA /* RxSwift.framework */,
+			);
+			name = "Recovered References";
+			sourceTree = "<group>";
+		};
 /* End PBXGroup section */
 
 /* Begin PBXNativeTarget section */
@@ -286,7 +295,7 @@
 				PRODUCT_BUNDLE_IDENTIFIER = "pt.ruicosta.iOS-Example";
 				PRODUCT_NAME = "$(TARGET_NAME)";
 				PROVISIONING_PROFILE = "";
-				SWIFT_VERSION = 3.0;
+				SWIFT_VERSION = 4.2;
 			};
 			name = Debug;
 		};
@@ -307,7 +316,7 @@
 				PRODUCT_BUNDLE_IDENTIFIER = "pt.ruicosta.iOS-Example";
 				PRODUCT_NAME = "$(TARGET_NAME)";
 				PROVISIONING_PROFILE = "";
-				SWIFT_VERSION = 3.0;
+				SWIFT_VERSION = 4.2;
 			};
 			name = Release;
 		};
diff --git a/iOS Example/iOS Example/ViewController.swift b/iOS Example/iOS Example/ViewController.swift
index d37578e..1f7f08c 100644
--- a/iOS Example/iOS Example/ViewController.swift	
+++ b/iOS Example/iOS Example/ViewController.swift	
@@ -22,9 +22,9 @@ class ViewController: UIViewController, RxMediaPickerDelegate {
         
         let views = ["buttonPhoto": buttonPhoto, "buttonVideo": buttonVideo, "container": container]
 
-        var constraints = NSLayoutConstraint.constraints(withVisualFormat: "V:|-50-[buttonPhoto]-20-[buttonVideo]-20-[container(==200)]", options: NSLayoutFormatOptions(rawValue: 0), metrics: .none, views: views)
+        var constraints = NSLayoutConstraint.constraints(withVisualFormat: "V:|-50-[buttonPhoto]-20-[buttonVideo]-20-[container(==200)]", options: NSLayoutConstraint.FormatOptions(rawValue: 0), metrics: .none, views: views)
 
-        constraints += NSLayoutConstraint.constraints(withVisualFormat: "H:[container(==200)]", options: NSLayoutFormatOptions(rawValue: 0), metrics: .none, views: views)
+        constraints += NSLayoutConstraint.constraints(withVisualFormat: "H:[container(==200)]", options: NSLayoutConstraint.FormatOptions(rawValue: 0), metrics: .none, views: views)
         
         constraints.append(NSLayoutConstraint(item: buttonPhoto, attribute: .centerX, relatedBy: .equal, toItem: view, attribute: .centerX, multiplier: 1, constant: 0))
         constraints.append(NSLayoutConstraint(item: buttonVideo, attribute: .centerX, relatedBy: .equal, toItem: view, attribute: .centerX, multiplier: 1, constant: 0))
@@ -62,7 +62,7 @@ class ViewController: UIViewController, RxMediaPickerDelegate {
         }
     }
     
-    func pickPhoto() {
+    @objc func pickPhoto() {
         picker.selectImage(editable: true)
             .observeOn(MainScheduler.instance)
             .subscribe(onNext: { (image, editedImage) in
@@ -81,7 +81,7 @@ class ViewController: UIViewController, RxMediaPickerDelegate {
             .disposed(by: disposeBag)
     }
         
-    func recordVideo() {
+    @objc func recordVideo() {
         #if (arch(i386) || arch(x86_64))
             let alert = UIAlertController(title: "Error - Simulator", message: "Video recording not available on the simulator", preferredStyle: .alert)
             alert.addAction(UIAlertAction(title: "OK", style: .default, handler: .none))